Delayed control time lock



Nov. 24,1936. w. c. MILLER 2,062,066 1 DELAYED CONTROL TIME LOCK FiledJuly 22, 1933 2 Sheets-Sheet 1.

Nov. 24, 1936. w. c. MILLER DELAYED CONTROL TIME LOCK Filed July 22,1933 2 Sheets-Sheet 2 Patented Nov. 24, 1936 UNITED STATES ENT OFFICEWilliam C. Miller, Canton,

Ohio, assignor to Diebold Safe & Lock Company, Canton, Ohio, acorporation of Ohio Application July 22, 1933, Serial No. 681,774

18 Claims.

This invention relates to a delayed control time lock and moreparticularly to a lock of such type operated by an electric current.

An object of the invention is to provide simple mechanism by which alook, after a combination has been set for unlocking, can be restrainedagainst operation for a predetermined period of time, electric timingmechanism being employed and being actuated from an exterior side of the4 safe door. Other specific objects and advantages will appear as thespecification proceeds.

The invention is illustrated, in a preferred embodiment, by theaccompanying drawings, in Which- Fig. 1 is a broken front View of a safedoor equipped with means for starting the timing or delayed controlmechanism embodying my invention; Fig. 2, a. broken transverse sectionalview; Fig. 3, a broken enlarged view in elevation and part-sectionalview of the switch mechanism em-.

ployed; Fig. 4, a rear View in elevation, the view being taken asindicated at line 44 of Fig. 2; Fig. 5, a front view in elevation, theview being taken as indicated at line 55 of Fig. 2; Fig. 6, a viewsimilar to Fig. 4 but showing the stop mechanism of Fig. 5; and Fig.7, adiagrammatic View of the wiring layout.

In the illustration given, A designates a safe door; B, an ordinarytumbler lock mechanism; and O, my improved delayed control mechanism.

The safe door A may be of any suitable construction and may be securedin any desired manner to a safe or chest. given in Fig. l, the door isprovided with a slidably mounted button or plunger I!) which is designedto close a circuit to start the operation of the delayed controlmechanism C.

The tumbler lock mechanism B may be of any suitable construction. In theillustration given, I have shown a combination lock of a type well knownin the trade. The dial member H is equipped with a spindle l2 andsecured to an operating disk l3. Journaled upon the spindle I2 are anumber of tumblers l4 provided with a series of notches (not shown)which are to be aligned to receive the cross-bar 15. The cross-bar I5 issecured to the draw-bar or link arm l6 which is pivotally connected tothe bolt IT. The arm [6 is provided with the usual depending tooth 18adapted to engage the recess H! of disk l3 when the bar 15 falls intothe aligned notches of the tumblers. As shown more clearly in Fig. 6,the link arm I6 is provided near its lower side with a projecting andsubstantially V-shaped web portion 20, thus providing a shoulder whichcooper- In the illustration ates with control mechanism which will belater described. In view of the Well known construction of the tumblerlock mechanism B, a detailed description is not believed to benecessary.

My improved time control mechanism comprises broadly stop or dog meansfor preventing the retraction of the main locking bolt, electricallyoperated time mechanism adapted to move the dog or stop to aninoperative position after a predetermined time, and automatic means forbreaking the circuit to stop the time control mechanism after the stopmeans has been moved to inoperative position. The time control mechanismand part ofthe tumbler lock mechanism are housed within casing B, asshown more clearly in Fig. 2.

In the specific illustration given, the stop or dog consists of a pin 2|adapted to engage the front portion of shoulder 20 on thebolt-retracting arm IS. The pin 2| is secured to one end of a lever 22carried by pivot 23. The opposite end of lever 22 is provided with anarm portion 24 adapted to be actuated by rotatable cam disk 25. The camdisk 25 is provided with a cam extension 25 adapted to engage thesurface 24 and to depress the opposite end of the lever 22 carrying pin2!. The depressing of pin 2| releases it from engagement with shoulder20 of the bolt-retracting arm and enables the bolt to be drawn tounlocked position. The cam disk 25 is mounted upon shaft 26 which inturn is rotated through a series of reduction gears 2i (not fullyshown), and within gear casing 28. The reduction gears 21 are driven bygear 29 which is mounted upon the armature shaft 30 extending into motor3|, as shown more clearly in Fig. 5. I prefer to employ a spring 32, asshown in Fig. 5, which draws the end of the lever 22 carrying pin 2! toraised position and holds the cam surface 24 in contact with the camdisk 25.

I also prefer to use a pivoted latch member 33, as shown more clearly inFigs. 4 and 6. The latch member is pivotally secured to a bracket member34 and is provided at its base with a rounded rear corner 35 whichpermits the latch to swing rearwardly but not forwardly. A spring 35 isemployed to draw the latch forward to a vertical position. The latch isprovided near its top with a forwardly projecting cam tooth 31 adaptedto engage pin 2! when the pin is swung to lowered position.

The means for breaking the circuit and stopping the motor 3! after thestop mechanism has been swung to inoperative position may be of anysuitable construction. In the illustration given, I provide a cam disk38 having a recess 39 on one side. The cam disk 38 is mounted upon shaft26 which is driven by the reduction gears 21, and which also carries thecam disk 25. A switch comprising two spring contact arms 40 and 4| islocated adjacent the cam disk 38. One of the contact arms is providedwith a pin 42 which engages the periphery of disk 38. As long as the pintravels on the periphery of the disk 38, the contact arm 40 is urgedtoward the contact arm so as to bring the contact points 40 and 4|together. When, however, the pin 42 drops into recess 39, because of thenatural tension thereon, the spring arm 48 moves away from arm 4| andseparates contact points 40 and M In the operation of the lock, thecombination is first set for unlocking as many ordinary combinationlock, the notches of the tumblers being aligned so as to permit bar IEto drop therein and so as to permit the depending lug |8 of the boltlever arm to drop into the recess I9 of the disk i3. The main lockingbolt I1 is then in a position to be retracted except for the engagementof the dogging pin 2| with the shoulder 20 of the bolt-retracting armHi. In order to remove the pin 2| to a position where it will not engageshoulder 20, the button ID on the exterior of the safe door is pressed.As may be seen more clearly from the wiring diagram of Fig. 7,depressing of button I!) closes the circuit in which the motor 3| isplaced so that the motor immediately starts into operation. The motordrives through a chain of reduction gears the shaft 26 which causes thecam disk 38 to rotate. A slight rotation of cam disk 38 causes the pin32 to move out of the depression 39 and brings the contact arms 40 and4| together. The operation of the motor is from this point on automatic,and the button I may be released. After a predetermined time, the motor,through the reduction gears, rotates cam disk 25 until the cam 725iengages the surface 24 of lever 22 and moves the lever 22 until pin 2|occupies the position, shown in dotted lines in Fig. 4, below tooth 31of latch 33. The bolt I! may then be retracted to unlocked position.

After the pin 2| has been moved to inoperative position so as to freethe arm I6, the motor continues to run until the depression 39 of camdisk 38 is' aligned with the pin 42 of the contact arm 48. As the pin 42enters the recess 39, the contact arms 40 and 4| are separated and thecircuit leading to the motor broken. The timing mechanism then remainsidle until button i0 is again pressed to close the motor circuit.

The retraction of bolt-arm I6 causes shoulder 20 to engage the latch 33and frees pin 2|, as shown more clearly in Fig. 6. The pin is held inlowered position by engagement with the bottom wall of arm Hi. Whenhowever, the bolt I1 is moved again to locking position, the pin 22 isfree from engagement with the bottom wall of arm I6 and is carried byspring-urged arm 22 to its original position shown in Figs. 4 and 5.

While in the foregoing description, I have described a specificmechanism for preventing the retraction of the bolt until thepredetermined time is elapsed, it will be obvious that other mechanismmay be employed to serve the same purpose without departing from thespirit of my invention. If desired, other mechanism may be employed inconjunction with my apparatus for varying the time through which thedelayed control mechanism operates, etc.

The foregoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitations should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible, in view of the prior art.

I claim:

1. A look comprising a door-locking bolt, main locking means serving toprevent retraction of said bolt, auxiliary means for preventingwithdrawal of the bolt, electrically driven mechanism within the spacecontrolled by said lock-equipped door arranged to operate upon beingenergized and after operation for a time to retract said auxiliarymeans, means held inoperative when said bolt is retracted forautomatically moving said auxiliary means to bolt-dogging position whensaid bolt is moved to locking position, and means operated from theexterior of said lock for energizing said electrically driven mechanism.

2. A lock comprising a door-locking bolt, main locking means serving toprevent retraction of said bolt, auxiliary means for preventingwithdrawal of the bolt, electrically driven timing mechanism arranged tooperate upon being energized and after operationfor a predeterminedperiod to move said auxiliary means to non-obstructing position, latchmeans for maintaining said auxiliary means in such position during theretraction of said bolt, and means without said lock for energizing saidtiming mechanism.

3. A look comprising a door-locking bolt, main locking means serving toprevent retraction of said bolt, auxiliary stop means for preventingwithdrawal of the bolt, means for rendering said stop means inoperative,means for maintaining said stop means in inoperative position during theretraction of said bolt but restoring said stop means to operativeposition when said bolt is thrown to locking position, electricallydriven mechanism arranged to operate upon being energized and afteroperation for a predetermined period to actuate said last-mentionedmeans, and means operated from the exterior of said lock for energizingsaid mechanism.

4. A look comprising a door-locking bolt, main locking means serving toprevent retraction of said bolt, auxiliary stop means for preventingwithdrawal of the bolt, means for rendering said stop means inoperative,latch means for holding said stop means inoperative, means actuated bythe throwing of said bolt to locking position for releasing said latchmeans, electrically driven mechanism arranged tooperate upon beingenergized and to actuate slowly said means for rendering the stop meansinoperative in order to effect withdrawal of the bolt after apredetermined time, and means operated from the exterior of said lockfor energizingsaid electrically driven mechanism.

5. A look comprising a door-locking bolt, main locking means servingtoprevent retraction of said bolt, auxiliary means for preventingwithdrawal of the bolt, electrically driven timing mechanism arranged tooperate upon being energized and after operation for a time to releasesaid auxiliary means, means for maintaining said auxiliary meansinoperative until after said bolt has been retracted and again thrown tolocking position, means operated from the exterior of said lock forenergizing said timing mechanism, and automatic means for breaking thecircuit in which said electrically driven mechanism is placed after saidauxiliary means has been released.

6. A look comprising a door-locking bolt, main locking means serving toprevent retraction of said bolt, a tiltably supported obstructing barpositioned to prevent the retraction of said bolt, electrically driventiming mechanism within the space controlled by said lock-equipped doorarranged to operate upon being energized and after operation for apredetermined period to tilt the obstructing portion of said bar out ofthe way of said bolt whereby said bolt may be retracted, means heldinoperative when said bolt is retracted for automatically moving saidauxiliary means to bolt-obstructing position when said bolt is moved tolocking position, and means operated from the exterior of said lock forenergizing said electrically driven mechanism.

'7. A look comprising a door-locking bolt, main locking means serving toprevent retraction of said bolt, a pivotally supported bar having oneend normally supported so as to prevent retraction of said bolt,electrically driven timing mechanism arranged to operate upon beingenergized and after operation for a time to bring the obstructing end ofsaid bar to non-obstructing position, means for holding said bar innon-obstructing position until said bolt has been retracted, and meansoperated from the exterior of said lock for energizing said electricallydriven mechanism.

8. A look comprising a door-locking bolt, a combination lock controllingthe retraction of said bolt, said combination lock comprising tumblersequipped with alignable slots and a bolt-retracting link equipped withmeans adapted toenter said slots whereby said bolt may be retracted, apivoted bar having one end adapted to engage said bolt-retracting linkand to prevent retraction of said bolt, electrically driven timingmechanism arranged to operate upon being energized and after operationfor a predetermined period to move said bar to non-obstructing position,latch means for holding said bar in non-obstructing position during theretraction of said bolt, and means carried by said link for engagingsaid latch and releasing said bar so that it may return to obstructingposition when the bolt is again in looking position.

9. A lock comprising a door-locking bolt, main locking means controllingthe operation of said bolt, auxiliary means for preventing thewithdrawal of said bolt, electrically driven timing mechanism arrangedto operate upon being energized and after operation for a time torelease said auxiliary means, means for maintaining said auxiliary meansinoperative until after said bolt has been retracted and again thrown tolocking position, and means operated from the exterior of said lock forenergizing said timing mechanism.

10. In combination in a lock device, a doorlocking bolt, main lockingmeans controlling the operation of said bolt, auxiliary means preventingwithdrawal of the bolt, electrically driven mechanism arranged tooperate upon being energized and after operation for a time to releasesaid auxiliary means, spring means adapted to be tensioned by therelease of said auxiliary means for automatically restoring theauxiliary means to bolt-obstructing position upon the moving of saidbolt to locking position, and means operated Irom the exterior of saidlock for energizing said electrically driven mechanism.

11. In combination in a lock device, a bolt for locking said door, mainlocking means controlling the operation of said bolt, auxiliary meansfor preventing withdrawal of the bolt, electrically driven mechanismarranged to operate upon being energized and after operation for a timeto release said auxiliary means, spring means adapted to be tensioned bythe release of said auxiliary means and under the control of saidlocking bolt for automatically moving said auxiliary means tobolt-obstructing position when said bolt is moved toward lockingposition, and means operated from the exterior of said lock forenergizing said electrically driven mechanism.

12. In a lock-control device, the combination of a slide movable tolocked and open positions, check means normally dogging said slide tolocked position, means to move the check means out of dogging relationto the slide, an electric motor for actuating said last-mentioned means,latch means to hold the check means out of dogging relation, said latchmeans being releasable by said slide upon movement to open position, acontrol switch for the motor, and means for closing said switch afterthe motor has been set in operation and opening said switch at the endof the movement of said check-means to non-dogging position.

13. In a lock-control device, the combination of a slide movable tolocked and open positions, check means normally dogging said slide tolocked position, means to move the check means out of dogging relationto the slide, an electric motor for actuating said last-mentioned means,latch means to hold the check means out of dogging relation, said latchmeans being releasable by said slide upon movement to open position, acontrol switch for the motor, and means actuated through the medium ofthe motor serving to open said switch at the end of the movement of saidcheckmeans to non-dogging position.

14. In a lock-control device, the combination of a slide movable tolocked and open positions, check means normally dogging said slide tolocked position, means to move the check means out of dogging relationto the slide, an electric motor for actuating said last-mentioned means,latch means to hold the check means out of dogging relation, said latchmeans being releasable by said slide upon movement to open position, anautomatic control switch for the motor, and an independent manual switchhaving connections with the electric circuit bridging thefirst-mentioned switch and serving to initiate the movement of the motorwhile the first-mentioned switch is in open position.

15. A lock device for a safe door: comprisingmechanism adapted to becarried by the inner side of said door comprising a door-locking bolt,main locking means controlling the operation of said bolt, abolt-dogging device normally obstructing withdrawal of said bolt, anelectric motor equipped with means for withdrawing said bolt-doggingdevice to non-obstructing position after the lapse of a predeterminedinterval, associated means for holding said device in nonobstructingposition when the bolt is retracted and eiiecting return to obstructingposition when the bolt is moved to locking position, and circuitcontrolling means for the motor circuit operative to maintain thecircuit during the withdrawal of said bolt-dogging device and to theninterrupt said circuit; and manually-controlled circuitcontrolling meanscontrolling the starting of said motor.

16. In combination: a combination-lock; a casing adapted to be carriedby the inner surface of a door to which said lock is to be applied, thefront portion of the casing serving to house the tumbler mechanism andassociated parts of the combination lock, including a door-locking bolt,and an actuating link therefor; and electric means housed in the rearportion of said casing serving to control Withdrawal of said bolt, saidelectric means comprising a bolt-dogging member normally dogging thebolt in locked position, an electric motor, a circuit controllingdevice, and. a gear-reduction train serving to actuate said boltdoggingdevice and said circuit-controlling device.

1'7. In means of the character set forth: a front casing section adaptedto be carried by the inner wall of a safe door; a combination lockhaving a spindle adapted to extend through the safe door and having abolt, tumbler mechanism, and a bolt-actuating link housed in saidcasing-section;

dogging member in dogging position when the 10 bolt is in lookingposition.

WILLIAM C. MILLER.

